* FTSEurofirst 300 closes up 1.5 percent
* U.S. data help lift financial stocks
* Energy shares slip, tracking weaker crude prices
By Atul Prakash
LONDON, Aug 28 (Reuters) - European stocks closed sharply higher on Thursday as investors returned to the market after crude prices slipped and data showed the U.S. economy expanded at a much stronger rate than reported earlier.
The banking sector was the biggest weighted sectoral gainer on the pan-European FTSEurofirst 300 <
> index that ended 1.5 percent higher at 1,190.91 points. But the benchmark is still down 21 percent this year.Sentiment improved after the U.S. data lifted optimism about a recovery in the economy, which has been under pressure following troubles in the U.S. housing market.
Figures showed the U.S. economy expanded at a 3.3 percent annual rate in the second quarter, as consumer spending and net exports were more robust than initially estimated and inventories fell less sharply.
Also, the number of U.S. workers filing new claims for jobless benefits fell by 10,000 last week, but remained at elevated levels indicating a weak labour market.
"People got really surprised by the second-quarter GDP revision and jobless claims, which also dropped surprisingly," said Franz Wenzel, strategist at AXA Investment Managers.
"But we are not out of the woods. For that we would definitely need something like a big relief on the inflation front," Paris-based Wenzel said.
French bank Credit Agricole <CAGR.PA> was one of the top gainers on the FTSEurofirst 300, jumping 8.9 percent despite posting a 94 percent fall in quarterly profit.
"People think that they've got the bulk of the writedowns out of the way and results in the third and fourth quarters will be better," said a London-based trader.
Other banks also advanced, with Barclays <BARC.L> rising 5.8 percent, UBS AG <UBSN.VX> rising 4.6 percent, HBOS <HBOS.L> jumping 4.2 percent and Royal Bank of Scotland <RBS.L> advancing 3.7 percent.
Insurance shares also gained on a broader market rally, despite a slide of 8.8 percent in shares of Swiss Life <SLHN.VX> after a profit warning and first-half earnings that missed analysts' forecasts due to writedowns.
Across Europe, Britain's FTSE 100 <
> closed up 1.3 percent, Germany's DAX < > up 1.6 percent and France's CAC 40 < > up 2 percent.Investors weathered a volatile August on financial markets by slightly lifting their stock holdings but kept exposure well below average, Reuters polls showed on Thursday. [
]
ENERGY STOCKS FALL
Shares in oils and gas companies tracked crude prices <CLc1>, which fell 2.4 percent after the International Energy Agency pledged to help out with additional supply if Tropical Storm Gustav damaged oil installations in the Gulf of Mexico.
BP <BP.L> fell 0.7 percent, Royal Dutch Shell <RDSa.L> declined 0.1 percent and Tullow Oil <TLW.L> fell 0.6 percent.
Shares in European retailers were also down on concerns that attempts to lure price-conscious shoppers may squeeze company profit margins.
Dutch supermarket group Ahold <AHLN.AS> was 4 percent lower after it reported a 14.2 percent drop in second-quarter profit, with margins dented by price cuts and promotions.
But J. Sainsbury <SBRY.L> jumped nearly 8 percent as traders cited renewed talk of a bid for Britain's third-largest supermarket chain. Sainsbury said it would not comment on the talk.
Daimler <DAIGn.DE> rose 0.8 percent, BMW <BMWG.DE> gained 2.2 percent and Peugeot <PEUP.PA> was up 1.5 percent. (Editing by Sue Thomas)